com.google.gerrit.server.restapi.change.CherryPickChange Maven / Gradle / Ivy
// Copyright (C) 2012 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.gerrit.server.restapi.change;
import static com.google.common.base.MoreObjects.firstNonNull;
import static com.google.gerrit.server.project.ProjectCache.noSuchProject;
import com.google.auto.value.AutoValue;
import com.google.common.base.Strings;
import com.google.common.collect.ImmutableSet;
import com.google.gerrit.common.Nullable;
import com.google.gerrit.entities.Account;
import com.google.gerrit.entities.BranchNameKey;
import com.google.gerrit.entities.Change;
import com.google.gerrit.entities.PatchSet;
import com.google.gerrit.entities.Project;
import com.google.gerrit.extensions.api.changes.CherryPickInput;
import com.google.gerrit.extensions.api.changes.NotifyHandling;
import com.google.gerrit.extensions.restapi.BadRequestException;
import com.google.gerrit.extensions.restapi.MergeConflictException;
import com.google.gerrit.extensions.restapi.ResourceConflictException;
import com.google.gerrit.extensions.restapi.RestApiException;
import com.google.gerrit.extensions.restapi.UnprocessableEntityException;
import com.google.gerrit.server.ChangeUtil;
import com.google.gerrit.server.GerritPersonIdent;
import com.google.gerrit.server.IdentifiedUser;
import com.google.gerrit.server.ReviewerSet;
import com.google.gerrit.server.approval.ApprovalsUtil;
import com.google.gerrit.server.change.ChangeInserter;
import com.google.gerrit.server.change.NotifyResolver;
import com.google.gerrit.server.change.PatchSetInserter;
import com.google.gerrit.server.change.ResetCherryPickOp;
import com.google.gerrit.server.change.SetCherryPickOp;
import com.google.gerrit.server.git.CodeReviewCommit;
import com.google.gerrit.server.git.CodeReviewCommit.CodeReviewRevWalk;
import com.google.gerrit.server.git.GitRepositoryManager;
import com.google.gerrit.server.git.GroupCollector;
import com.google.gerrit.server.git.MergeUtil;
import com.google.gerrit.server.notedb.ChangeNotes;
import com.google.gerrit.server.notedb.ReviewerStateInternal;
import com.google.gerrit.server.notedb.Sequences;
import com.google.gerrit.server.project.InvalidChangeOperationException;
import com.google.gerrit.server.project.NoSuchProjectException;
import com.google.gerrit.server.project.ProjectCache;
import com.google.gerrit.server.project.ProjectState;
import com.google.gerrit.server.query.change.ChangeData;
import com.google.gerrit.server.query.change.InternalChangeQuery;
import com.google.gerrit.server.submit.IntegrationConflictException;
import com.google.gerrit.server.submit.MergeIdenticalTreeException;
import com.google.gerrit.server.update.BatchUpdate;
import com.google.gerrit.server.update.UpdateException;
import com.google.gerrit.server.util.CommitMessageUtil;
import com.google.gerrit.server.util.time.TimeUtil;
import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.Singleton;
import java.io.IOException;
import java.sql.Timestamp;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.TimeZone;
import org.eclipse.jgit.errors.ConfigInvalidException;
import org.eclipse.jgit.errors.InvalidObjectIdException;
import org.eclipse.jgit.errors.MissingObjectException;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.ObjectInserter;
import org.eclipse.jgit.lib.ObjectReader;
import org.eclipse.jgit.lib.PersonIdent;
import org.eclipse.jgit.lib.Ref;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevWalk;
import org.eclipse.jgit.util.ChangeIdUtil;
@Singleton
public class CherryPickChange {
@AutoValue
abstract static class Result {
static Result create(Change.Id changeId, ImmutableSet filesWithGitConflicts) {
return new AutoValue_CherryPickChange_Result(changeId, filesWithGitConflicts);
}
abstract Change.Id changeId();
abstract ImmutableSet filesWithGitConflicts();
}
private final Sequences seq;
private final Provider queryProvider;
private final GitRepositoryManager gitManager;
private final TimeZone serverTimeZone;
private final Provider user;
private final ChangeInserter.Factory changeInserterFactory;
private final PatchSetInserter.Factory patchSetInserterFactory;
private final SetCherryPickOp.Factory setCherryPickOfFactory;
private final MergeUtil.Factory mergeUtilFactory;
private final ChangeNotes.Factory changeNotesFactory;
private final ProjectCache projectCache;
private final ApprovalsUtil approvalsUtil;
private final NotifyResolver notifyResolver;
private final BatchUpdate.Factory batchUpdateFactory;
@Inject
CherryPickChange(
Sequences seq,
Provider queryProvider,
@GerritPersonIdent PersonIdent myIdent,
GitRepositoryManager gitManager,
Provider user,
ChangeInserter.Factory changeInserterFactory,
PatchSetInserter.Factory patchSetInserterFactory,
SetCherryPickOp.Factory setCherryPickOfFactory,
MergeUtil.Factory mergeUtilFactory,
ChangeNotes.Factory changeNotesFactory,
ProjectCache projectCache,
ApprovalsUtil approvalsUtil,
NotifyResolver notifyResolver,
BatchUpdate.Factory batchUpdateFactory) {
this.seq = seq;
this.queryProvider = queryProvider;
this.gitManager = gitManager;
this.serverTimeZone = myIdent.getTimeZone();
this.user = user;
this.changeInserterFactory = changeInserterFactory;
this.patchSetInserterFactory = patchSetInserterFactory;
this.setCherryPickOfFactory = setCherryPickOfFactory;
this.mergeUtilFactory = mergeUtilFactory;
this.changeNotesFactory = changeNotesFactory;
this.projectCache = projectCache;
this.approvalsUtil = approvalsUtil;
this.notifyResolver = notifyResolver;
this.batchUpdateFactory = batchUpdateFactory;
}
/**
* This function is used for cherry picking a change.
*
* @param change Change to cherry pick.
* @param patch The patch of that change.
* @param input Input object for different configurations of cherry pick.
* @param dest Destination branch for the cherry pick.
* @return Result object that describes the cherry pick.
* @throws IOException Unable to open repository or read from the database.
* @throws InvalidChangeOperationException Parent or branch don't exist, or two changes with same
* key exist in the branch.
* @throws UpdateException Problem updating the database using batchUpdateFactory.
* @throws RestApiException Error such as invalid SHA1
* @throws ConfigInvalidException Can't find account to notify.
* @throws NoSuchProjectException Can't find project state.
*/
public Result cherryPick(Change change, PatchSet patch, CherryPickInput input, BranchNameKey dest)
throws IOException, InvalidChangeOperationException, UpdateException, RestApiException,
ConfigInvalidException, NoSuchProjectException {
return cherryPick(
change,
change.getProject(),
patch.commitId(),
input,
dest,
TimeUtil.nowTs(),
null,
null,
null,
null);
}
/**
* This function is called directly to cherry pick a commit. Also, it is used to cherry pick a
* change as well as long as sourceChange is not null.
*
* @param sourceChange Change to cherry pick. Can be null, and then the function will only cherry
* pick a commit.
* @param project Project name
* @param sourceCommit Id of the commit to be cherry picked.
* @param input Input object for different configurations of cherry pick.
* @param dest Destination branch for the cherry pick.
* @return Result object that describes the cherry pick.
* @throws IOException Unable to open repository or read from the database.
* @throws InvalidChangeOperationException Parent or branch don't exist, or two changes with same
* key exist in the branch.
* @throws UpdateException Problem updating the database using batchUpdateFactory.
* @throws RestApiException Error such as invalid SHA1
* @throws ConfigInvalidException Can't find account to notify.
* @throws NoSuchProjectException Can't find project state.
*/
public Result cherryPick(
@Nullable Change sourceChange,
Project.NameKey project,
ObjectId sourceCommit,
CherryPickInput input,
BranchNameKey dest)
throws IOException, InvalidChangeOperationException, UpdateException, RestApiException,
ConfigInvalidException, NoSuchProjectException {
return cherryPick(
sourceChange, project, sourceCommit, input, dest, TimeUtil.nowTs(), null, null, null, null);
}
/**
* This function can be called directly to cherry-pick a change (or commit if sourceChange is
* null) with a few other parameters that are especially useful for cherry-picking a commit that
* is the revert-of another change.
*
* @param sourceChange Change to cherry pick. Can be null, and then the function will only cherry
* pick a commit.
* @param project Project name
* @param sourceCommit Id of the commit to be cherry picked.
* @param input Input object for different configurations of cherry pick.
* @param dest Destination branch for the cherry pick.
* @param timestamp the current timestamp.
* @param revertedChange The id of the change that is reverted. This is used for the "revertOf"
* field to mark the created cherry pick change as "revertOf" the original change that was
* reverted.
* @param changeIdForNewChange The Change-Id that the new change of the cherry pick will have.
* @param idForNewChange The ID that the new change of the cherry pick will have. If provided and
* the cherry-pick doesn't result in creating a new change, then
* InvalidChangeOperationException is thrown.
* @return Result object that describes the cherry pick.
* @throws IOException Unable to open repository or read from the database.
* @throws InvalidChangeOperationException Parent or branch don't exist, or two changes with same
* key exist in the branch. Also thrown when idForNewChange is not null but cherry-pick only
* creates a new patchset rather than a new change.
* @throws UpdateException Problem updating the database using batchUpdateFactory.
* @throws RestApiException Error such as invalid SHA1
* @throws ConfigInvalidException Can't find account to notify.
* @throws NoSuchProjectException Can't find project state.
*/
public Result cherryPick(
@Nullable Change sourceChange,
Project.NameKey project,
ObjectId sourceCommit,
CherryPickInput input,
BranchNameKey dest,
Timestamp timestamp,
@Nullable Change.Id revertedChange,
@Nullable ObjectId changeIdForNewChange,
@Nullable Change.Id idForNewChange,
@Nullable Boolean workInProgress)
throws IOException, InvalidChangeOperationException, UpdateException, RestApiException,
ConfigInvalidException, NoSuchProjectException {
IdentifiedUser identifiedUser = user.get();
try (Repository git = gitManager.openRepository(project);
// This inserter and revwalk *must* be passed to any BatchUpdates
// created later on, to ensure the cherry-picked commit is flushed
// before patch sets are updated.
ObjectInserter oi = git.newObjectInserter();
ObjectReader reader = oi.newReader();
CodeReviewRevWalk revWalk = CodeReviewCommit.newRevWalk(reader)) {
Ref destRef = git.getRefDatabase().exactRef(dest.branch());
if (destRef == null) {
throw new InvalidChangeOperationException(
String.format("Branch %s does not exist.", dest.branch()));
}
RevCommit baseCommit = getBaseCommit(destRef, project.get(), revWalk, input.base);
CodeReviewCommit commitToCherryPick = revWalk.parseCommit(sourceCommit);
if (input.parent <= 0 || input.parent > commitToCherryPick.getParentCount()) {
throw new InvalidChangeOperationException(
String.format(
"Cherry Pick: Parent %s does not exist. Please specify a parent in"
+ " range [1, %s].",
input.parent, commitToCherryPick.getParentCount()));
}
// If the commit message is not set, the commit message of the source commit will be used.
String commitMessage = Strings.nullToEmpty(input.message);
commitMessage = commitMessage.isEmpty() ? commitToCherryPick.getFullMessage() : commitMessage;
String destChangeId = getDestinationChangeId(commitMessage, changeIdForNewChange);
ChangeData destChange = null;
if (destChangeId != null) {
// If "idForNewChange" is not null we must fail, since we are not expecting an already
// existing change.
destChange = getDestChangeWithVerification(destChangeId, dest, idForNewChange != null);
}
if (changeIdForNewChange != null) {
// If Change-Id was explicitly provided for the new change, override the value in commit
// message.
commitMessage = ChangeIdUtil.insertId(commitMessage, changeIdForNewChange, true);
} else if (destChangeId == null) {
// If commit message did not specify Change-Id, generate a new one and insert to the
// message.
commitMessage =
ChangeIdUtil.insertId(commitMessage, CommitMessageUtil.generateChangeId(), true);
}
commitMessage = CommitMessageUtil.checkAndSanitizeCommitMessage(commitMessage);
CodeReviewCommit cherryPickCommit;
ProjectState projectState =
projectCache.get(dest.project()).orElseThrow(noSuchProject(dest.project()));
PersonIdent committerIdent = identifiedUser.newCommitterIdent(timestamp, serverTimeZone);
try {
MergeUtil mergeUtil;
if (input.allowConflicts) {
// allowConflicts requires to use content merge
mergeUtil = mergeUtilFactory.create(projectState, true);
} else {
// use content merge only if it's configured on the project
mergeUtil = mergeUtilFactory.create(projectState);
}
cherryPickCommit =
mergeUtil.createCherryPickFromCommit(
oi,
git.getConfig(),
baseCommit,
commitToCherryPick,
committerIdent,
commitMessage,
revWalk,
input.parent - 1,
input.allowEmpty,
input.allowConflicts);
oi.flush();
} catch (MergeIdenticalTreeException | MergeConflictException e) {
throw new IntegrationConflictException("Cherry pick failed: " + e.getMessage(), e);
}
try (BatchUpdate bu = batchUpdateFactory.create(project, identifiedUser, timestamp)) {
bu.setRepository(git, revWalk, oi);
bu.setNotify(resolveNotify(input));
Change.Id changeId;
String newTopic = null;
if (input.topic != null) {
newTopic = Strings.emptyToNull(input.topic.trim());
}
if (newTopic == null
&& sourceChange != null
&& !Strings.isNullOrEmpty(sourceChange.getTopic())) {
newTopic = sourceChange.getTopic() + "-" + dest.shortName();
}
if (destChange != null) {
// The change key exists on the destination branch. The cherry pick
// will be added as a new patch set.
changeId =
insertPatchSet(
bu,
git,
destChange.notes(),
cherryPickCommit,
sourceChange,
newTopic,
workInProgress);
} else {
// Change key not found on destination branch. We can create a new
// change.
changeId =
createNewChange(
bu,
cherryPickCommit,
dest.branch(),
newTopic,
project,
sourceChange,
sourceCommit,
input,
revertedChange,
idForNewChange,
workInProgress);
}
bu.execute();
return Result.create(changeId, cherryPickCommit.getFilesWithGitConflicts());
}
}
}
private RevCommit getBaseCommit(Ref destRef, String project, RevWalk revWalk, String base)
throws RestApiException, IOException {
RevCommit destRefTip = revWalk.parseCommit(destRef.getObjectId());
// The tip commit of the destination ref is the default base for the newly created change.
if (Strings.isNullOrEmpty(base)) {
return destRefTip;
}
ObjectId baseObjectId;
try {
baseObjectId = ObjectId.fromString(base);
} catch (InvalidObjectIdException e) {
throw new BadRequestException(
String.format("Base %s doesn't represent a valid SHA-1", base), e);
}
RevCommit baseCommit;
try {
baseCommit = revWalk.parseCommit(baseObjectId);
} catch (MissingObjectException e) {
throw new UnprocessableEntityException(
String.format("Base %s doesn't exist", baseObjectId.name()), e);
}
InternalChangeQuery changeQuery = queryProvider.get();
changeQuery.enforceVisibility(true);
List changeDatas = changeQuery.byBranchCommit(project, destRef.getName(), base);
if (changeDatas.isEmpty()) {
if (revWalk.isMergedInto(baseCommit, destRefTip)) {
// The base commit is a merged commit with no change associated.
return baseCommit;
}
throw new UnprocessableEntityException(
String.format("Commit %s does not exist on branch %s", base, destRef.getName()));
} else if (changeDatas.size() != 1) {
throw new ResourceConflictException("Multiple changes found for commit " + base);
}
Change change = changeDatas.get(0).change();
if (!change.isAbandoned()) {
// The base commit is a valid change revision.
return baseCommit;
}
throw new ResourceConflictException(
String.format(
"Change %s with commit %s is %s",
change.getChangeId(), base, ChangeUtil.status(change)));
}
private Change.Id insertPatchSet(
BatchUpdate bu,
Repository git,
ChangeNotes destNotes,
CodeReviewCommit cherryPickCommit,
@Nullable Change sourceChange,
String topic,
@Nullable Boolean workInProgress)
throws IOException {
Change destChange = destNotes.getChange();
PatchSet.Id psId = ChangeUtil.nextPatchSetId(git, destChange.currentPatchSetId());
PatchSetInserter inserter = patchSetInserterFactory.create(destNotes, psId, cherryPickCommit);
inserter.setMessage("Uploaded patch set " + inserter.getPatchSetId().get() + ".");
inserter.setTopic(topic);
if (workInProgress != null) {
inserter.setWorkInProgress(workInProgress);
}
if (shouldSetToReady(cherryPickCommit, destNotes, workInProgress)) {
inserter.setWorkInProgress(false);
}
bu.addOp(destChange.getId(), inserter);
PatchSet.Id sourcePatchSetId = sourceChange == null ? null : sourceChange.currentPatchSetId();
// If sourceChange is not provided, reset cherryPickOf to avoid stale value.
if (sourcePatchSetId == null) {
bu.addOp(destChange.getId(), new ResetCherryPickOp());
} else if (destChange.getCherryPickOf() == null
|| !destChange.getCherryPickOf().equals(sourcePatchSetId)) {
SetCherryPickOp cherryPickOfUpdater = setCherryPickOfFactory.create(sourcePatchSetId);
bu.addOp(destChange.getId(), cherryPickOfUpdater);
}
return destChange.getId();
}
/**
* We should set the change to be "ready for review" if: 1. workInProgress is not already set on
* this request. 2. The patch-set doesn't have any git conflict markers. 3. The change used to be
* work in progress (because of a previous patch-set).
*/
private boolean shouldSetToReady(
CodeReviewCommit cherryPickCommit,
ChangeNotes destChangeNotes,
@Nullable Boolean workInProgress) {
return workInProgress == null
&& cherryPickCommit.getFilesWithGitConflicts().isEmpty()
&& destChangeNotes.getChange().isWorkInProgress();
}
private Change.Id createNewChange(
BatchUpdate bu,
CodeReviewCommit cherryPickCommit,
String refName,
String topic,
Project.NameKey project,
@Nullable Change sourceChange,
@Nullable ObjectId sourceCommit,
CherryPickInput input,
@Nullable Change.Id revertOf,
@Nullable Change.Id idForNewChange,
@Nullable Boolean workInProgress)
throws IOException, InvalidChangeOperationException {
Change.Id changeId = idForNewChange != null ? idForNewChange : Change.id(seq.nextChangeId());
ChangeInserter ins = changeInserterFactory.create(changeId, cherryPickCommit, refName);
ins.setRevertOf(revertOf);
if (workInProgress != null) {
ins.setWorkInProgress(workInProgress);
} else {
ins.setWorkInProgress(
(sourceChange != null && sourceChange.isWorkInProgress())
|| !cherryPickCommit.getFilesWithGitConflicts().isEmpty());
}
BranchNameKey sourceBranch = sourceChange == null ? null : sourceChange.getDest();
PatchSet.Id sourcePatchSetId = sourceChange == null ? null : sourceChange.currentPatchSetId();
ins.setMessage(
revertOf == null
? messageForDestinationChange(
ins.getPatchSetId(), sourceBranch, sourceCommit, cherryPickCommit)
: "Uploaded patch set 1.") // For revert commits, the message should not include
// cherry-pick information.
.setTopic(topic);
if (revertOf == null) {
ins.setCherryPickOf(sourcePatchSetId);
}
if (input.keepReviewers && sourceChange != null) {
ReviewerSet reviewerSet =
approvalsUtil.getReviewers(changeNotesFactory.createChecked(sourceChange));
Set reviewers =
new HashSet<>(reviewerSet.byState(ReviewerStateInternal.REVIEWER));
reviewers.add(sourceChange.getOwner());
reviewers.remove(user.get().getAccountId());
Set ccs = new HashSet<>(reviewerSet.byState(ReviewerStateInternal.CC));
ccs.remove(user.get().getAccountId());
ins.setReviewersAndCcs(reviewers, ccs);
}
// If there is a base, and the base is not merged, the groups will be overridden by the base's
// groups.
ins.setGroups(GroupCollector.getDefaultGroups(cherryPickCommit.getId()));
if (input.base != null) {
List changes =
queryProvider.get().setLimit(2).byBranchCommitOpen(project.get(), refName, input.base);
if (changes.size() > 1) {
throw new InvalidChangeOperationException(
"Several changes with key "
+ input.base
+ " reside on the same branch. "
+ "Cannot cherry-pick on target branch.");
}
if (changes.size() == 1) {
Change change = changes.get(0).change();
ins.setGroups(changeNotesFactory.createChecked(change).getCurrentPatchSet().groups());
}
}
bu.insertChange(ins);
return changeId;
}
private NotifyResolver.Result resolveNotify(CherryPickInput input)
throws BadRequestException, ConfigInvalidException, IOException {
return notifyResolver.resolve(
firstNonNull(input.notify, NotifyHandling.ALL), input.notifyDetails);
}
private String messageForDestinationChange(
PatchSet.Id patchSetId,
BranchNameKey sourceBranch,
ObjectId sourceCommit,
CodeReviewCommit cherryPickCommit) {
StringBuilder stringBuilder = new StringBuilder("Patch Set ").append(patchSetId.get());
if (sourceBranch != null) {
stringBuilder.append(": Cherry Picked from branch ").append(sourceBranch.shortName());
} else {
stringBuilder.append(": Cherry Picked from commit ").append(sourceCommit.getName());
}
stringBuilder.append(".");
if (!cherryPickCommit.getFilesWithGitConflicts().isEmpty()) {
stringBuilder.append("\n\nThe following files contain Git conflicts:");
cherryPickCommit.getFilesWithGitConflicts().stream()
.sorted()
.forEach(filePath -> stringBuilder.append("\n* ").append(filePath));
}
return stringBuilder.toString();
}
/**
* Returns the Change-Id of destination change (as intended by the caller of cherry-pick
* operation).
*
* The Change-Id can be provided in one of the following ways:
*
*
* - Explicitly provided for the new change.
*
- Provided in the input commit message.
*
- Taken from the source commit if commit message was not set.
*
*
* Otherwise should be generated.
*
* @param commitMessage the commit message, as intended by the caller of cherry-pick operation.
* @param changeIdForNewChange the explicitly provided Change-Id for the new change.
* @return The Change-Id of destination change, {@code null} if Change-Id was not provided by the
* caller of cherry-pick operation and should be generated.
*/
@Nullable
private String getDestinationChangeId(
String commitMessage, @Nullable ObjectId changeIdForNewChange) {
if (changeIdForNewChange != null) {
return CommitMessageUtil.getChangeIdFromObjectId(changeIdForNewChange);
}
return CommitMessageUtil.getChangeIdFromCommitMessageFooter(commitMessage).orElse(null);
}
/**
* Returns the change from the destination branch, if it exists and is valid for the cherry-pick.
*
* @param destChangeId the Change-ID of the change in the destination branch.
* @param destBranch the branch to search by the Change-ID.
* @param verifyIsMissing if {@code true}, verifies that the change should be missing in the
* destination branch.
* @return the verified change or {@code null} if the change was not found.
* @throws InvalidChangeOperationException if the change was found but failed validation
*/
@Nullable
private ChangeData getDestChangeWithVerification(
String destChangeId, BranchNameKey destBranch, boolean verifyIsMissing)
throws InvalidChangeOperationException {
List destChanges =
queryProvider.get().setLimit(2).byBranchKey(destBranch, Change.key(destChangeId));
if (destChanges.size() > 1) {
throw new InvalidChangeOperationException(
"Several changes with key "
+ destChangeId
+ " reside on the same branch. "
+ "Cannot create a new patch set.");
}
if (destChanges.size() == 1 && verifyIsMissing) {
throw new InvalidChangeOperationException(
String.format(
"Expected that cherry-pick with Change-Id %s to branch %s "
+ "in project %s creates a new change, but found existing change %d",
destChangeId,
destBranch.branch(),
destBranch.project().get(),
destChanges.get(0).getId().get()));
}
ChangeData destChange = destChanges.size() == 1 ? destChanges.get(0) : null;
if (destChange != null && destChange.change().isClosed()) {
throw new InvalidChangeOperationException(
String.format(
"Cherry-pick with Change-Id %s could not update the existing change %d "
+ "in destination branch %s of project %s, because the change was closed (%s)",
destChangeId,
destChange.getId().get(),
destBranch.branch(),
destBranch.project(),
destChange.change().getStatus().name()));
}
return destChange;
}
}
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